Mold for making concrete structures.



' J. M. TIMMONS.

MOLD FOR MAKING CONCRETE STRUCTURES.

APPLICATION FILED EEIT. 23, 190,1.

JAIIIES M. TIlVIIVIONS, OF DELAVTARE, OHIO.

MOLD FOR MAKING CONCRETE STRUCTURES.

Specification of Letters Yatent.

Patented Nov. is, race.

Application filed September 23, 1907. Serial No. 394,224.

To all whom it may concern:

Be it known that 1, JAMES M. TIMMOIQS, a citizen of the United States,residing at Delaware, in the county of Delaware and State of Ohio, haveinvented a new and useful Mold for Making Concrete Structures, of whichthe following is a specification.

This invention relates to molds for making walls, silos, tanks andsimilar structures from cement, concrete and other plastic material andhas for its object to provide a mold including a plurality of pivotallyconnected sections capable of being adjusted laterally to permit theformation of tanks of different cross sectional diameters.

A further object of the invention is to provide the inner mold sectionwith laterally extending ribs which project within the moldingcompartment so as to form the exterior walls of the tank or silo withspaced circumferential seating grooves for the reception of reinforcingbands.

A further object is to provide improved means for clamping the moldsections in assembled position, and means for bridging the ribs at thejuncture of adjacent sections.

A still further object of the invention is generally to improve thisclass of devices so as to increase their utility, durability andefiiciency.

Further objects and advantages will appear in the following description,it being understood that various changes in form, proportions and minordetails of construction may be resorted to within the scope of theappended claims.

In the accompanying drawings forming a part of this specification:Figure 1 is a top plan view of a mold constructed in ac cordance with myinvention showing the same in position on a wall. Fig. 2 is a sideelevation of the same. Fig. 3 is an enlarged vertical sectional view.Fig. i is a rear elevation of one of the pivotal sections of the innershell detached. 5 is a front elevation of said inner shell section. Fig.6 is a perspective view of one of the filling strips used in connectionwith the inner shell sections. Fig. 7 is a perspective view of the innerface of one of the outer shell sections. Fig. 8 is a perspective view ofthe opposite side of the outer shell section. Fig. 9 is a detailtransverse sectional view showing the i l i i manner of bridging thegrooves forming the ribs. Fig. 10 is a detail perspective view of thebrldge member detached.

Similar numerals of reference indicate corresponding parts in all of thefigures of the drawings.

The improved mold forming the subject matter of the present inventionincludes an inner shell 5 and an outer shell 6, said shells being spacedapart to form an intermediate molding compartment for the reception ofthe cement, concrete or other plastic material constituting the wall 7.

The inner and outer shells are each preferably formed of a plurality ofsections having their opposite ends inclined or beveled at 8 andpivotally connected by suitable hinges 9 so that the sections may beadjusted laterally and thereby permit the formation of tanks ofdifierent cross sectional diameters.

The leaves of the hinges are provided with elongated slots 10 for thereception of screws or similar fastening devices 11 whereby the inclinedends of adjacent mold sections may be spaced apart when forming certainstyles of walls.

The hinges are preferably reinforced and strengthened by the provisionof one or more longitudinal ribs 12, while each hinge is provided with adepending pin 13 which engages a corresponding socket formed in theadjacent leaf of the hinge whereby the sect-ions of the inner and outershells may be lifted vertically off the wall after the cement orconcrete has set.

The fastening devices 11 are provided with enlarged heads 14 havingopposite flat faces so that by rotating the fastening devices until thefiat faces thereof register with the slots 10 either leaf of the hingemay be readily disconnected from the adjacent section of the mold.

The pivoted members constituting the inner shell of the mold are eachpreferably formed in two sections 15 and 16, the inner sections 15 beingprovided with inwardly extending pins or lugs 17 which engagecorrespondingly shaped slots 18 formed in the outer sections 16 so thatsaid sections may be adjusted laterally to conform to the pivotedsections of the outer shell of the mold.

The sections 15 and 16 of the inner shell members are each preferablyformed in two parts, the parts forming the outer sections 16 beingprovided with lateral extensions 19 which over-lap the parts forming theinner sections 15, there being suitable fillin strips 20 adapted toengage the vertical slots 21 formed between the parts of the innersections 15 when the latter are adjusted thereby to form a smoothunobstructed surface for contact with the cement or other plasticmaterial forming the wall.

Secured to the lower longitudinal edges of the several mold sections aresupporting brackets 22 which extend transversely across the moldingcompartmentand bear against the upper face of the finished wall, saidbrackets being provided with depending feet 23 which engage the oppositefaces of the wall and serve to hold the lower edges of the mold sectionagainst accidental displacement.

T he depending feet 23 are adjustable laterally so that they may bearranged in alinement with the outer faces of the mold sections when onemold is positioned above the other during the erection of a wall.

The horizontal arms of the brackets 22 are preferably provided withelongated slots 22 in which are seated bolts or similar fasteningdevices 23 which latter engage the lower edges of the mold and serve tomaintain the brackets in position thereon.

As a means for retaining the sections com prising the inner and outershells in position on the wall there are provided one or more clampingmembers each consisting of a horizontally disposed bar 24 provided withspaced depending arms 25 which engage the exterior faces of adjacentmold sections and are connected with the opposite ends of the bar bymeans of diagonal braces 26.

One of the depending arms of each clamp is pivotally connected with thebar 24: and also with the end of the adjacent brace 26, the latter beingprovided with spaced notches or recesses 27 which engage a locking pin28 so that by releasing the pin from engagement with the notch the bracetogether with the supporting arm may be swung laterally to the dottedline position shown in Fig. 3 of the drawings thereby to permit theready detachment of the clamp.

Secured to the lower face of each bar 24 is a block 29 which serves tospace the adj acent mold sections and support the same in contact wit-hthe depending arms 25.

Secured to the inner face of the sections comprising the outer shell arespaced longitudinally disposed ribs 30 which project within the moldingcompartment and serve to form the exterior face of the wall or tank witha plurality of spaced circumferential gagement with the turn buckle 34so that by adjusting the turn buckles the tension of the clamping bandsmay be adjusted, the seating grooves 31 being subsequently filled withcement so as to effectually house the clamping bands and present asmooth unobstructed surface at the exterior face of the wall.

In order to form a continuous seating groove 1n the wall suitable bridgepieces 35 are disposed at the juncture of the pivoted clamps areextended transversely across said shell with the spacing blocks bearingagainst the interior faces of the adjacent mold sections.

The cement, concrete or other plastic material is then shoveled orotherwise introduced in the molding compartment and thoroughly tamped.After the lower course is formed the clamping members are removed andthe several sections comprising the mold placed in position on the upperedge of the completed wall with the depending feet bearing against theadjacent faces of the wall, as best shown in Fig. 3 of the drawings,this operation being continued until the entire wall is formed.

hen it is desired to employ two or more molds during the erection of thewall the depending feet 23 are adjusted laterally so that when one moldis positioned upon the other the depending feet 23 of the upper moldwill bear against the exterior walls of the lower mold and thus maintainsaid mold in vertical alinement when filling the same. After the wall iscompleted the clamping bands 32 are introduced in the seating groovesand the tension thereof regulated by adjusting the turn buckles afterwhich the clamping bands are housed by introducing cement in the seatinggrooves, in the manner before stated.

In order to increase or diminish the size of the tank it is merelynecessary to adjust the mold sect-ions longitudinally or laterally withrespect to each other, the slots 10 and fastening devices 11 permittingsaid adjustment.

It will of course be understood that prior at the juncture of the ribsof adjacent sections. so that the exterior face of the wall will beformed with a continuous seating groove for the reception of theclamping bands or wires.

lVhile it is preferred to use a single tier of mold sections inconstructing the wall it is obvious that a plurality of tiers of saidsections may be employed in which event the depending feet of the uppersection will engage the exterior walls of the lower mold section. asbefore stated.

Having thus described the invention what is claimed is:

1. A mold including inner and outer shells spaced apart to form anintermediate molding compartment, each shell being formed of a pluralityof sections, groove forming ribs extending laterally from one of saidshell sections and projecting within the molding compartment, and bridgepieces connecting the ribs.

2. A mold including inner and outer shells each formed of a plurality ofpivotally connected sections, hinges disposed at the juncture ofadjacent sections and having elongated slots formed therein, andfastening devices passing through said slots and engaging the sectionsfor locking the sections in adjusted position.

3. A mold including sectional inner and outer shells spaced apart toform an intermediate molding compartment, slotted hinges connecting thesections of each shell, and ribs extending laterally from the sectionsof the outer shell and projecting within the molding compartment.

, 4:. A mold including sectional inner and outer shells spaced apart toform an intermediate holding compartment, each section of the innershell being formed of two or more members having a pin and slotconnection between the same.

A mold including sectional inner and outer shells spaced apart to forman intermediate holding compartment, the sections comprising the innershell being each formed of two or more members having a pin and slotconnection between the same, and ribs extending laterally from thesections of the outer shell and projecting within the mold ingcompartment.

6. A mold including sectional inner and outer shells spaced apart toform an intermediate molding compartment, the sections of the innershell being each formed of laterally adjustable members having a pin andslot connection, slotted hinges connecting the sections of the inner andouter shells, and ribs extending laterally from the sections of theouter shells and projecting within the molding compartment.

'7. A mold including sectional inner and outer shells, hinges forming apivotal connection between the sections of each shell and havingelongated slots formed therein. strei'igthenmg ribs disposed on eachside of i the slots, fastening devices passing through the slots andengaging the adjacent sections, ribs extending inwardly and laterallyfrom the inner faces of the outer shell sections and projecting withinthe molding compartment, and bridge pieces disposed at the juncture ofadjacent. ribs.

8. A mold including inner and outer shells spaced apart to form anintermediate molding compartment, and each formed of a plurality ofpivotally connected sections ribs formed on the inner faces of thesections of the outer shell and projecting within the moldingcompartment, bridge pieces connecting the ribs at the juncture of saidsections and clamping members extending transversely across the moldingcompartment and provided with spacing blocks for engagement with theinner walls of said shells.

9. A mold including inner and outer shells spaced apart to form anintermediate molding compartment, each shell being formed of a pluralityof longitudinally adjustable pivotally united sections, brackets securedto the exterior faces of said sections and extending transversely acrossthe molding compartment, shoes depending from the brackets, and clampingmembers extending transversely across the upper edges of the sectionsand provided with depending spacing blocks seated within the moldingcompartment and bearing against the inner walls of adjacent shells.

10. A mold including inner and outer shells spaced apart to form anintermediate molding compartment and each formed of a plurality ofpivotally connected sections capable of being adjusted laterally, ribssecured to the inner faces of the sections of the outer shell andprojecting within the molding compartment, bridge pieces disposed at thejuncture of adjacent sections and embracing the adjacent ribs, barsextending transversely across the upper edges of the shells and providedwith depending arms having lateral braces connected therewith, one ofthe said arms and the adjacent brace being pivotally connected andmovable laterally to released position, spaced blocks secured to thebars and seated in the molding compartment, brackets secured to thelower edges of the sections, and laterally adjustable shoes dependingfrom the brackets.

11. A mold including inner and outer shells spaced apart to form anintermediate molding compartment and each formed with pivotally unitedsections having their opposite ends inclined or beveled, each sectioncomprising the inner shell being formed in two parts having a pin andslot connection, hinges forming a pivotal connection between thesections of the inner and outer shells and provided with elongatedslots, fastening devices passing through said slots and engaging theadjacent sections, ribs formed on the inner faces of the outer shellsections and projecting Within the molding compartment to form spacedcircumferential grooves in the Wall for the reception of reinforcinghands, clamps engaging the upper longitudinal edges of the shellsections, and brackets secured to the lower longitudinal edges of thesections and provided with depending shoes.

12. A mold including inner and outer sectional shells spaced apart toform an intermediate molding compartment the sections forming the innershell being each formed of two members adjustable one upon the other andhaving a pin and slot connection, ribs secured to the inner faces of theouter shell sections and projecting Within the molding compartment,slotted hinges forming a pivotal connection between the sections of theinner and outer shells, and filling strips for closing the spacesbetween the adjustable members constituting the sections of the in nershell.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two Witnesses.

JAMES M. TIMMONS.

W'itnesses ERNEST R. DIKE, E. D. Dawson.

